though may also have negative impact on the total network power consumption, for instance when it leads to the deployment of multiple infrastructures or equipments to avoid a dominant position of an operator. On the operator side, cost savings generated by power consumption reduction are already an incentive. For example, the usage of GPON in the access segment could reflect in economic savings through OPEX reduction. In we calculated the in a country like Italy, where there are about 25.3 million of house units, GPON could allow to save up to 500 GWh/year with respect to adsl2+ , leading to a reduction of opex equal to 800 million e in 10 years.